Air purifier



FIG. 1 is a perspective view of an air purifier, showing the new design:

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left-side elevation view thereof;

FIG. 5 is a right-side elevation view thereof

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a front perspective view of an air purifier thereof showing the air outlet in a standing state;

FIG. 9 is a rear perspective view thereof;

FIG. 10 is a front elevation view thereof;

FIG. 11 is a rear elevation view thereof;

FIG. 12 is a left-side elevation view thereof;

FIG. 13 is a right-side elevation view thereof;

FIG. 14 is a top plan view thereof; and,

FIG. 15 is a bottom plan view thereof.

The evenly spaced broken lines and unshaded areas depict portions of the air purifier that form no part of the claimed design. 

CLAIM We claim the ornamental design for an air purifier, as shown and described. 